Patent Application
20230128353
The present application claims priority to Korean Patent Application No. 10-2021-0143425, filed Oct. 26, 2021 and Korean Patent Application No. 10-2022-0134272, filed Oct. 18, 2022, the entire contents of which is incorporated herein for all purposes by this reference.
The present disclosure relates to a temperature sensor and a disc brake having the temperature sensor, and more particularly, to a temperature sensor measuring the temperature of a disc and a disc brake having the temperature sensor.
A disc brake refers to a brake that provides braking force by attaching a metal disc to a rotating shaft of a wheel and pressing both sides of the disc with brake pads made of a material having a high coefficient of friction.
A disc brake stops a wheel because the frictional force generated by pressing the disc with brake pads converts the rotational kinetic energy of the wheel into thermal energy. Since the disc brake inevitably generates heat during the braking process of the wheel, the disc and brake pads are made of highly durable materials.
However, a problem is that use of the disc may deteriorate the durability of the disc and brake pad or sufficient braking force may not be provided due to an abnormality arising from the excessive use of the disc and brake pad, which may lead to a serious accident.
Accordingly, attempts have been made to forestall an abnormal situation with the disc brake by measuring the temperature of the disc in real time while the disc brake is in use.
However, the conventional probe temperature sensor installed near the disc for measuring the temperature of the disc is slow in measuring the temperature such that measuring the heat of the instantaneously heating disc in real time is difficult.
Further, the conventional infrared temperature sensor is suitable for quickly measuring the disc temperature in real time, but unlike the probe temperature sensor, the durability is poor and the measurement accuracy decreased due to the environment.
An object of the present disclosure is to provide a temperature sensor configured to measure the temperature of a measurement target free from the effect of the environment and a disc brake having the temperature sensor.
Objects of the present disclosure are not limited to the objects described above, and other objects not described will be clearly understood by those skilled in the art to which the present disclosure pertains from the following descriptions.
According to an aspect of the present disclosure, there is provided a temperature sensor for measuring the temperature of a first surface of a measurement target. The temperature sensor includes: a housing having a second surface formed outside to be spaced apart from the first surface at a predetermined interval to receive heat from the first surface and a third surface formed inside on one side of a first inner space formed inside to receive heat from the second surface; a temperature sensing module fixed to the housing to measure the temperature of the third surface; and a connector transmitting temperature information sensed by the temperature sensing module to the outside.
The temperature sensing module may be fixed on the other side of the first inner space and the first inner space may be closed off to the outside.
The temperature sensing module may be disposed to face the second surface.
The temperature sensing module may measure the temperature of the third surface by sensing infrared rays emitted from the third surface.
The third surface may be positioned to face the second surface.
The third surface may be formed such that the center of the third surface coincides with the center of the sensing region of the temperature sensing module.
The housing may include a holder of which the temperature sensing module is fixed to one side and the connector is connected to the other side, a first cover connected to one side of the holder to form the closed first inner space, the second surface may be formed on one side of the outside of the first cover, and the third surface may be formed on one side of the inside of the first cover.
The housing may include a second cover coupled to the other side of the holder to form a closed second inner space, and the connector may be connected to the temperature sensing module through a conductive cable.
The second cover may include a cover through hole formed on one side, one end of the conductive cable may be disposed in the second inner space through the cover through hole, and a second sealing member disposed between the cover through hole and the outer circumferential surface of the conductive cable may be further included.
The third surface may be included in a sensing region of the temperature sensing module.
The third surface may be spaced apart from the temperature sensing module at a predetermined distance.
The housing may extend in the sensing direction of the temperature sensing module, and the second surface may be formed on the outer surface of the extending tip end portion of the housing.
The housing may be formed such that the area of a cross section perpendicular to the sensing direction decrease toward the extending tip end portion.
The housing may include a first protrusion protruding toward the first surface of the measurement target, the second surface may be formed outside the tip end portion of the first protrusion, and the third surface may be formed inside the tip end portion of the first protrusion.
On the other hand, according to another aspect of the present disclosure, there is provide a disc brake having a temperature sensor. The disc brake includes: a plate-shaped disc; a first brake pad and a second brake pad configured to press one side of one surface and one side of the other surface of the disc respectively; a temperature sensor having a housing of which a second surface is formed on one side of the outside and a third surface is formed on one side of the inside, a temperature sensing module fixed to the housing to sense the temperature of the third surface, and a connector transmitting the temperature information sensed by the temperature sensing module to the outside; and a bracket fixing the housing such that the second surface of the housing is positioned to be spaced apart at a third interval from a first surface positioned on the other side of the other surface of the disc.
The bracket may fix the housing so that the second surface is parallel to the first surface.
The bracket may include a first through hole, and the housing may be inserted into the first through hole to be coupled by screwing.
the first through hole may penetrate the bracket in the direction perpendicular to the first surface, and the housing may move back and forth in the direction perpendicular to the first surface in the rotation direction.
the bracket may further include a first through hole penetrating in the direction perpendicular to the first surface and a second through hole penetrating in the penetrating direction of the first through hole, the housing may further include a third protrusion protruding from the side and a third through hole penetrating the third protrusion in a sensing direction of the temperature sensing module, and the housing may be inserted into the first through hole to be coupled by screwing through the second through hole and the third through hole.
the housing may include a first protrusion protruding toward the first surface of the disc, the second surface may be formed outside the tip end portion of the first protrusion, the third surface may be formed inside the tip end portion of the first protrusion, the bracket may further include a first through hole penetrating in a direction perpendicular to the first surface, a second through hole penetrating in the penetrating direction of the first through hole, a cover portion covering the first surface side of the first through hole, and a fourth through hole formed in the cover portion, the housing may be inserted into the first through hole, and the first protrusion of the housing may be inserted into the fourth through hole.
Hereinafter, embodiments of the present disclosure are described in detail so that those skilled in the art to which the present disclosure pertains may readily embody the present disclosure. The present disclosure may be implemented in various forms and is not limited to the embodiments described herein. The parts irrelevant to the descriptions are omitted from the drawings for a clearer description of the present disclosure, and the same reference numerals are assigned to the same or similar components throughout the specification.
The words and terms used in the present specification and claims are not to be construed as limited to their conventional or dictionary meanings but construed in terms of meanings and concepts consistent with the technical ideas of the present disclosure in accordance with the principles by which the inventor may define the terms and concepts to best describe his/her disclosure.
Therefore, the embodiments described in the present specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present disclosure and do not represent all of the technical ideas of the present disclosure so that the configurations may be replaced with various equivalents and modification examples when the application of the present disclosure is filed.
In the present specification, terms such as “comprise” or “have” are intended to indicate the presence of implemented features, numbers, steps, manipulations, components, parts, or combinations thereof described in the specification and are not to be understood to preclude the presence or additional possibilities of one or more of other features, numbers, steps, manipulations, components, parts or combinations thereof.
The presence of one component “in front of”, “in the rear of″, above”, or “below” another component includes not only the one component being disposed “in front of”, “in the rear of”, “above”, or “below” the another component in direct contact but a third component being interposed therebetween unless otherwise specified. Further, “connection” of one component to another component includes an indirect connected as well as a direct connection to each other unless otherwise specified.
Hereinafter, a disc brake 1 having a temperature sensor 100 according to various embodiments of the present disclosure will be described with reference to the drawings.
As illustrated in
As illustrated in
At this time, a pad housing 500 and the carrier 600 are movably coupled relative to each other. The first brake pad and the second brake pad may contact the disc 400 in the moving direction of the pad housing 500 and the carrier 600. Accordingly, the first brake pad and the second brake pad may simultaneously press the front surface and the rear surface of the disc 400, and the friction force between the first and second brake pads and the disc 400 provides a braking force against the rotation of the wheel.
However, there is no limit in the shape or coupling structure of the pad housing 500 and the carrier 600 for pressing the disc 400 as described above. Various pad housings 500 and carriers 600 may be used as long as the front surface and the rear surface of the disc 400 may be pressed by the first brake pad and the second brake pad.
Heat due to friction is generated in the process of pressing the disc 400 by the first brake pad and the second brake pad. Accordingly, the temperature of the disc 400 rapidly increases.
When the temperature of the disc 400 exceeds a predetermined range, deformation of the surface of the disc 400 or thermal damage to the first brake pad or the second brake pad may make it difficult to provide adequate braking force sometimes. Since braking is directly related to the safety of the driver, it is important to track and observe the temperature of the disc 400 to forestall a decrease of braking force caused by overheating of the disc 400.
As illustrated in
The temperature sensor 100 is disposed on the other side of the rear surface of the disc 400. That is, the second brake pad is disposed on one side of the rear surface of the disc 400, and the temperature sensor 100 is disposed on the other side of the rear surface of the disc 400.
The present specification describes temperature measurement of the other side on the rear surface of the disc 400 by the temperature sensor 100, but the measurement target of the temperature sensor 100 according to various embodiments of the present disclosure is not limited to the disc 400 provided in the disc brake 1.
According to the first embodiment of the present disclosure, as illustrated in
As illustrated in
At this time, the housing 110 may be divided into a holder 112, a first cover 111, and a second cover 113. The holder 112 supports the temperature sensing module 120 so that the temperature sensing module 120 may be fixed in the first inner space 111a. As illustrated in
At this time, as illustrated in
There is no limit in the way the first cover 111 and the holder 112 are coupled to each other. In the present embodiment, a screw thread is formed on the inner circumferential surface of the first cover 111 and a screw thread is formed on the outer circumferential surface on the front side of the holder 112 so that the first cover 111 and the holder 112 are coupled by screwing.
There is no limit in the shape of the first cover 111 as long as a space may be formed therein. According to the embodiment, as illustrated in
As illustrated in
The second surface 111b and the third surface 111c may refer to the entire front surface and rear surface of the front plant of the first cover 111 or may refer to a part of the front surface and the rear surface.
The second surface 111b is formed outside the first cover 111, and the third surface 111c is formed inside the first cover 111. That is, the second surface 111b is formed to face the first surface 400a, and the third surface 111c is formed to face the temperature sensing module 120.
As illustrated in
To be more specific, as illustrated in
At this time, since the second surface 111b is to be disposed adjacent to the first surface 400a, the second surface 111b is formed at the outermost side of the tip end portion of the first cover 111. Accordingly, the second surface 111b and the first surface 400a are formed to face each other.
In particular, the first surface 400a and the second surface 111b may be formed parallel to each other so that heat generated from the first surface 400a may be evenly transferred to the second surface 111b.
The third surface 111c formed inside the first cover 111 and the second surface 111b face opposite directions. A detailed description of the third surface 111c will be provided in the description of a second embodiment below.
As illustrated in
On the other hand, the second surface 111b may be formed smaller than the first surface 400a so that the second surface 111b may receive heat more efficiently. To this end, the first cover 111 of the temperature sensor 100 of the disc brake 1 having the temperature sensor 100 according to a second embodiment of the present disclosure may be formed such that the area of the cross section perpendicular to the extending direction of the first cover 111 decreases toward the front. At this time, there is no limit in the form of the gradually decreasing cross sectional area of the first cover 111.
As illustrated in
As illustrated in
At this time, the distance between the second surface 111b′ and the third surface 111c′ is defined as a first interval d1. The first interval d1 may be formed thin so that the heat transferred to the second surface 111b′ from the first surface 400a may be fully transferred to the third surface 111c′ along the first cover 111′ .
At this time, the third surface 111c′ is disposed in the area in which the temperature sensing module 120 measures the temperature. Accordingly, the first interval d1 may be determined such that the temperature of the third surface 111c′ is within a temperature range measurable by the temperature sensing module 120 when the heat transferred to the second surface 111b′ is transferred to the third surface 111c′.
As illustrated in
As illustrated in
The space between the third surface 111c′ and the temperature sensing module 120 may have the same cross section perpendicular to the extending direction of the first cover 111. This may not only increase the durability of the first cover 111 but also prevent heat from being transferred to the temperature sensing module 120 disposed inside the first cover 111′ when the heat emitted from the rear surface of the disc 400 including the first surface 400a is transferred through the first cover 111′.
As illustrated in
At this time, as illustrated in
As illustrated in
As illustrated in
As illustrated in
On the other hand, the temperature sensing module 120 senses the temperature of the third surface 111c″. The temperature sensing module 120 may use various known sensor modules as long as the sensor modules may sense the temperature of the third surface 111c″ without directly contacting the third surface 111c″. For example, the temperature sensing module 120 according to the present embodiment may be an infrared sensor module that measures the temperature of the third surface 111c″ by sensing infrared rays emitted from the third surface 111c″.
As illustrated in
Since the temperature sensing module 120 is a sensor module susceptible to the environment, the first inner space 111a″ is closed off to the outside. That is, the first inner space 111a″ is closed off to the outside by the first cover 111″ and the holder 112.
The temperature sensing module 120 is fixed to the holder 112 such that the sensing region includes the third surface 111c″. That is, the holder 112 or the bracket 300 may be designed by adjusting the second interval d2 so that the temperature sensing module 120 may accurately measure the temperature of the third surface 111c″. At this time, the temperature sensing module 120 is disposed such that the center of the sensing region coincides with the center of the third surface 111c″ to improve the sensing accuracy of the temperature sensing module 120.
On the other hand, as illustrated in
Alternatively, as illustrated in
As described above, measuring the temperature of the third surface 111c″ transferred through the first cover 111″ rather than directly measuring the temperature of the first surface 400a of the disc 400 through the temperature sensing module 120 protects the temperature sensing module 120 from the foreign substance generated by the friction between the disc 400 and the brake pads or the foreign substance drifting up from the road, thereby improving the measurement accuracy or durability of the temperature sensing module 120.
Further, failures caused by direct exposure of the temperature sensing module 20 to the disc 400 and consequently to the temperature beyond the temperature range measurable by the temperature sensing module 120 may be forestalled.
On the other hand, as illustrated in
At this time, there is no limit in the way the temperature sensing module 120 and the connector 140 are connected. For example, as illustrated in
Further, although it is not illustrated in the drawings, the connector 140 and the temperature sensing module 120 may be connected through wireless communication. In this case, a communication module (not shown) is connected to the rear of the holder 112, and the connector 140 is disposed outside the housing 110′. The connector 140 may receive and transmit to the outside the temperature information measured by the temperature sensing module 120 via a wireless communication module (not shown).
A second cover 113 is described with reference to
As illustrated in
As the second cover 113 and the holder 112 are coupled, a second inner space 113a is formed by the second cover 113 and the holder 112. The second inner space 113a is closed off such that one end of the conductive cable 150 connected to the temperature sensing module 120 fixed to the holder 112 is not exposed to the outside.
At this time, a first sealing member 160 may be disposed between the second cover 113 and the holder 112 to prevent an unforeseen short circuit that may occur by substances—liquid foreign substances, in particular—introduced into the second inner space 113a reaching the connecting portion between the conductive cable 150 and the temperature sensing module 120.
Further, a cover through hole 113b is formed in the second cover 113 so that the conductive cable 150 may be connected to the connector 140 disposed outside the second cover 113. Accordingly, as illustrated in
At this time, a second sealing member 170 may be further disposed between the cover through hole 113b and the outer circumferential surface of the conductive cable 150 to prevent foreign substances from moving into the second inner space 113a through the cover through hole 113b.
On the other hand, a bracket 300 is formed in the pad housing 500 or the carrier 600 to fix the temperature sensor 100, 100′, 100″ described above in the rear of the disc 400. The bracket 300 may be integrally formed in the pad housing 500 or the carrier 600 or may be fixedly coupled to the pad housing 500 or the carrier 600.
There is no limit in the shape of the bracket as long as the bracket may fix the temperature sensor 100. The bracket 300 of the disc brake 1 having the temperature sensor 100 according to the first embodiment for fixing the temperature sensor 100 to the bracket will be described with reference to
The bracket 300 protrudes laterally from the carrier 600. A first through hole 310 penetrating in the direction perpendicular to the first surface 400a of the disc 400 is formed in the bracket 300. At this time, the housing 110 of the temperature sensor 100 is fixedly inserted into the first through hole 310. Accordingly, the second surface 111b of the housing 110 may be disposed parallel to the first surface 400a.
As illustrated in
As described above, the housing 110 is coupled to the bracket by screwing so that the third interval d3 which is the distance between the first surface 400a and the second surface 111b may be adjusted in the rotation direction of the housing 110.
The bracket 300 of the disc brake 1 having the temperature sensor 100″ according to the third embodiment for fixing the temperature sensor 100 to the bracket 300 will be described with reference to
As illustrated in
As illustrated in
The housing 110″ may be inserted from the rear toward the front from the rear of the bracket 300. In this case, the front surface of the second protrusion 111e is in contact with the rear surface of the bracket 300. At this time, the housing 110″ may be fixed to the bracket 300 by fixing the second protrusion 111e and the bracket 300.
To this end, a second through hole 330 is formed in the bracket 300 and a third through hole 111f is formed at a position corresponding to the position of the second through hole 330 in the second protrusion 111e of the housing 110″. At this time, a bolt 700 is inserted through the second through hole 330 and the third through hole 111f and a nut 800 is coupled to the bolt 700 so that the housing 110″ is fixed to the bracket 300. This allows a firmer coupling of the housing 110″ to the bracket 300 than the direct coupling of the housing 110″ to the bracket 300 by screwing.
On the other hand, as illustrated in
The cover portion 340 covers the front side of the first through hole 310 formed in the bracket 300. At this time, the cover portion 340 is formed convex toward the front so that the housing 110″ may be disposed for insertion through the first through hole 310. Accordingly, as illustrated in
As illustrated in
That is, the first protrusion 111d of the first cover 111″ is exposed toward the disc 400 through the fourth through hole 341, and the portions other than the first protrusion 111d of the first cover 111″ is covered by the cover portion 340 not to be exposed toward the disc 400.
Accordingly, the heat generated on the rear surface of the disc 400 concentrates only on the first protrusion 111d of the first cover 111″. Accordingly, the heat collected through the second surface 111b″ may concentrate on the third surface 111c″, thereby improving the measurement accuracy of the temperature sensing module 120.
Further, the cover portion 340 covers the first cover 111″ except the first protrusion 111d so that the heat generated in the disc 400 may be prevented from being transferred through the first cover 111 except the first protrusion 111d. This may prevent the temperature sensing module 120 disposed in the first inner space 111a″ from being disposed in a high-temperature environment by excessive overheating of the first cover 111″.
That is, heat transfer concentrates on the third surface 111c″ which is the area the temperature sensing module 120 measures the temperature while heat transfer to the temperature sensing module 120 is prevented, thereby improving the durability of the temperature sensing module 120.
According to an embodiment of the present disclosure, the temperature sensing module is disposed inside the housing so that the temperature sensor and the disc brake having the temperature sensor may measure the temperature of the measurement target in real time free from the effect of the environment.
It is to be understood that the effects of the present disclosure are not limited to the effects described above and include all the effects deducible from the configuration of the disclosures described in the descriptions or claims of the present disclosure.
Preferred embodiments of the present disclosure are described above, and it is obvious to those skilled in the art that the present disclosure may be embodied in specific forms other than the embodiment described above without departing from the intention and scope of the present disclosure. Therefore the above-described embodiments are to be considered illustrative rather than restrictive, and thus the present disclosure may be modified within the scope of the appended claims and their equivalents rather than being limited to the above descriptions.
1: disc brake
120: temperature sensing module
100, 100′. 100″: temperature sensor
140: connector
110, 110′, 110″: housing
150: conductive cable
111, 111′, 111″: first cover
160: first sealing member
111
a, 111a″, 111a″: first inner space
170: second sealing member
111
b, 111b′, 111b″: second surface
300: bracket
111
c, 111c′, 111c″: second surface
310: first through hole
111
d: first protrusion
320: second screw thread
111
e: second protrusion
330: second through hole
111
f: third through hole
340: cover portion
111
g: third protrusion
341: fourth through hole
113
a: second inner space
400: disc
113
b: cover through hole
400
a: first surface
112: holder
500: pad housing
113: second cover
600: carrier
114: first screw thread
700: bolt
115: partitioning wall
800: nut
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-0143425 | Oct 2021 | KR | national |
| 10-2022-0134272 | Oct 2022 | KR | national |
